If you're jumping into the S.T.A.L.K.E.R. Trilogy Enhanced Edition on any platform – whether it's PC (via Steam, Epic Games Store, or GOG), Xbox, or PlayStation – here's the deal with achievements and progression.
Achievements in the S.T.A.L.K.E.R. Trilogy are specifically tied to the platform and game store you are playing on. This means your achievement progress and the achievements you unlock are unique to that specific version of the game. If you start playing on an Xbox, your achievements will not transfer to PlayStation or any of the PC stores, and vice versa.
Similarly, there is no cross-platform progression. Switching from one platform (like PC) to another (like PlayStation) means you will be starting fresh not only with your game save but also with your achievement list.
However, it's important to note that while the achievements are bound to the platform/store, the challenges and completion requirements for each individual achievement are the same across all versions of the game. So, regardless of where you play, the tasks you need to complete to earn an achievement will be identical.
In short, whichever platform you choose for the S.T.A.L.K.E.R. Trilogy Enhanced Edition, you'll have a unique set of achievements linked to that specific version, though the criteria for earning them remain consistent as you explore the intense world of the Zone!